Communication problems

My boyfriend and I have been together for a year. Lately, we've been having a lot of communication problems with either him not explaining what he wants or me not offering up how I'm feeling. I guess you could consider myself a quiet person. I'm not one to tell others how I'm feeling or share a lot of details on what's going on in my life. I learned from an early age, that not everyone is your friend or is genuinely concerned about you. (Not saying I never do, if someone really asks about things then I'll tell them.) When I got together with my boyfriend, he informed me about his family and how they lie to him often in order to spare him. I can understand the hurt behind that. I have tried very hard to change the quirks about myself. I let him know what's going on with school and my family, but not always how I'm feeling. It's not like I do it to hurt me on purpose or anything malicious, sometimes I don't even know what the hell I'm feeling or how to even express it. Fast forward to last weekend... His friends rented a cabin for a weekend to just getaway. I'm not close with any of them or know them very well (just the occasional get together for dinner or something). I was excited for the trip, until I got in the car with his friends and could literally feel my mood going down. It didn't help that we fought a little before I got into the car. From that Friday until Saturday I was just sad and didnt want to be around everyone if I couldn't bring myself to be cheerful and engage normally. I told my boyfriend that I was okay, since I wanted him to fully enjoy himself with his friends and not be brought down or worried about his sad girlfriend who shouldn't have came. Of course I eventually told him what was wrong, and he was hurt that I didnt talk to him about it. I fucked up. I can understand that, but now it feels like I can't move without doing something wrong. For example: his friend texted him that he saw me on Bumble (Bumble BFF since I'm trying to make friends in my new town) and because I was shocked at him seeing me on there, he took it as I may have been on dating sites, which I'm not. He brought it back to that weekend and how it's hard for him to trust me now. I don't know what to do at this point. It seems like even if I make good strides, one mishap screws up the whole process. I just wish that he could understand how difficult it can be for me to talk sometimes